1/*	$KAME: rip6query.c,v 1.11 2001/05/08 04:36:37 itojun Exp $	*/
2
3/*
4 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the project nor the names of its contributors
16 *    may be used to endorse or promote products derived from this software
17 *    without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 *
31 * $FreeBSD$
32 */
33
34#include <stdio.h>
35
36#include <unistd.h>
37#include <stdlib.h>
38#include <string.h>
39#include <ctype.h>
40#include <signal.h>
41#include <errno.h>
42#include <err.h>
43
44#include <sys/types.h>
45#include <sys/socket.h>
46#include <sys/queue.h>
47
48#include <net/if.h>
49#if defined(__FreeBSD__) && __FreeBSD__ >= 3
50#include <net/if_var.h>
51#endif /* __FreeBSD__ >= 3 */
52#include <netinet/in.h>
53#include <netinet/in_var.h>
54#include <arpa/inet.h>
55#include <netdb.h>
56
57#include "route6d.h"
58
59static int	s;
60static struct sockaddr_in6 sin6;
61static struct rip6	*ripbuf;
62
63#define	RIPSIZE(n)	(sizeof(struct rip6) + (n-1) * sizeof(struct netinfo6))
64
65int main(int, char **);
66static void usage(void);
67static const char *sa_n2a(struct sockaddr *);
68static const char *inet6_n2a(struct in6_addr *);
69
70int
71main(int argc, char *argv[])
72{
73	struct netinfo6 *np;
74	struct sockaddr_in6 fsock;
75	int i, n, len;
76	int c;
77	int ifidx = -1;
78	int error;
79	socklen_t flen;
80	char pbuf[10];
81	struct addrinfo hints, *res;
82
83	while ((c = getopt(argc, argv, "I:")) != -1) {
84		switch (c) {
85		case 'I':
86			ifidx = if_nametoindex(optarg);
87			if (ifidx == 0) {
88				errx(1, "invalid interface %s", optarg);
89				/*NOTREACHED*/
90			}
91			break;
92		default:
93			usage();
94			exit(1);
95			/*NOTREACHED*/
96		}
97	}
98	argv += optind;
99	argc -= optind;
100
101	if (argc != 1) {
102		usage();
103		exit(1);
104	}
105
106	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
107		err(1, "socket");
108		/*NOTREACHED*/
109	}
110
111	/* getaddrinfo is preferred for addr@ifname syntax */
112	snprintf(pbuf, sizeof(pbuf), "%d", RIP6_PORT);
113	memset(&hints, 0, sizeof(hints));
114	hints.ai_family = AF_INET6;
115	hints.ai_socktype = SOCK_DGRAM;
116	error = getaddrinfo(argv[0], pbuf, &hints, &res);
117	if (error) {
118		errx(1, "%s: %s", argv[0], gai_strerror(error));
119		/*NOTREACHED*/
120	}
121	if (res->ai_next) {
122		errx(1, "%s: %s", argv[0], "resolved to multiple addrs");
123		/*NOTREACHED*/
124	}
125	if (sizeof(sin6) != res->ai_addrlen) {
126		errx(1, "%s: %s", argv[0], "invalid addrlen");
127		/*NOTREACHED*/
128	}
129	memcpy(&sin6, res->ai_addr, res->ai_addrlen);
130	if (ifidx >= 0)
131		sin6.sin6_scope_id = ifidx;
132
133	if ((ripbuf = (struct rip6 *)malloc(BUFSIZ)) == NULL) {
134		err(1, "malloc");
135		/*NOTREACHED*/
136	}
137	ripbuf->rip6_cmd = RIP6_REQUEST;
138	ripbuf->rip6_vers = RIP6_VERSION;
139	ripbuf->rip6_res1[0] = 0;
140	ripbuf->rip6_res1[1] = 0;
141	np = ripbuf->rip6_nets;
142	bzero(&np->rip6_dest, sizeof(struct in6_addr));
143	np->rip6_tag = 0;
144	np->rip6_plen = 0;
145	np->rip6_metric = HOPCNT_INFINITY6;
146	if (sendto(s, ripbuf, RIPSIZE(1), 0, (struct sockaddr *)&sin6,
147			sizeof(struct sockaddr_in6)) < 0) {
148		err(1, "send");
149		/*NOTREACHED*/
150	}
151	do {
152		flen = sizeof(fsock);
153		if ((len = recvfrom(s, ripbuf, BUFSIZ, 0,
154				(struct sockaddr *)&fsock, &flen)) < 0) {
155			err(1, "recvfrom");
156			/*NOTREACHED*/
157		}
158		printf("Response from %s len %d\n",
159			sa_n2a((struct sockaddr *)&fsock), len);
160		n = (len - sizeof(struct rip6) + sizeof(struct netinfo6)) /
161			sizeof(struct netinfo6);
162		np = ripbuf->rip6_nets;
163		for (i = 0; i < n; i++, np++) {
164			printf("\t%s/%d [%d]", inet6_n2a(&np->rip6_dest),
165				np->rip6_plen, np->rip6_metric);
166			if (np->rip6_tag)
167				printf(" tag=0x%x", ntohs(np->rip6_tag));
168			printf("\n");
169		}
170	} while (len == RIPSIZE(24));
171
172	exit(0);
173}
174
175static void
176usage(void)
177{
178	fprintf(stderr, "usage: rip6query [-I iface] address\n");
179}
180
181/* getnameinfo() is preferred as we may be able to show ifindex as ifname */
182static const char *
183sa_n2a(struct sockaddr *sa)
184{
185	static char buf[NI_MAXHOST];
186
187	if (getnameinfo(sa, sa->sa_len, buf, sizeof(buf),
188			NULL, 0, NI_NUMERICHOST) != 0) {
189		snprintf(buf, sizeof(buf), "%s", "(invalid)");
190	}
191	return buf;
192}
193
194static const char *
195inet6_n2a(struct in6_addr *addr)
196{
197	static char buf[NI_MAXHOST];
198
199	return inet_ntop(AF_INET6, addr, buf, sizeof(buf));
200}
201